Wireless Remote; Requirements; Remote Control Specifications - Lennox MHA Series Service Manual

5. Wireless Remote

IMPORTANT!
Frequent changes to operating mode may cause system
malfunction. Allow at least one minute between mode
changes for the system to stabilize.
5.1.

Requirements

Using the remote controller
• Point the remote controller directly at the indoor unit.
• Stand within 26 feet (8 meters) of the indoor unit.
• Do not block the signal between the remote controller
and indoor unit.
NOTE: The remote controller will not function without a
clear line of sight to the indoor unit.
• Do not submerge the remote controller in liquid.
• Do not expose to direct sunlight.
• Do not drop or step on remote controller.
• Remote control holder
Use field-provided fasteners to attach the remote controller
holder to any suitable vertical surface such as a wall.
5.2. Remote Control Specifications
Table 2.
Function
Rated voltage
Min voltage for sending signal to CPU
Effective transmitting distance
Operation conditions
Function Buttons
ON/OFF
MODE
FAN
SLEEP
TURBO
Figure 8. Remote Control Buttons
• Up arrow button. Press to increase the temperature
setpoint or to scroll through settings options.
• On/Off button. Press to turn the system on or off.
Specifications
Specifications
3.0 VDC (2 AAA batteries)
2.4 VDC
26 feet (8 meters)
23°F to 140°F (-5 to 60°C)
SILENCE
FP
TIMER
ON
TEMP
TIMER
OFF
SWING DIRECT
LED FOLLOW
SELF
ME
CLEAN
Mode button. Press to scroll through the operation
•
modes:
Auto → Cool → Dry → Heat → Fan.
• Fan speed. Press to scroll through the fan speeds:
Auto → Low → Med → High.
• Sleep button. Press to activate "night-mode". This will
automatically increase (cooling) or decrease (heating)
the setpoint 2°F (1°C) increment per hour for the first
two hours. The modified setpoint will be set for five
hours. After seven total hours the indoor unit will turn
off.
NOTE: SLEEP mode is only available when the unit is in
COOL, HEAT or AUTO mode.
• Turbo button. Press to active turbo mode. In both
heating and cooling modes only, the indoor fan will
ramp up to reach the setpoint more quickly. After
reaching the setpoint or after 30 minutes, the indoor
unit will resume the previous operating conditions.
• Self Clean button. Press to activate self cleaning
mode. In cooling or dry mode only, the indoor unit will
temporarily change operation to allow condensate on
the indoor unit coil to evaporate, and then will return to
the previous operating conditions.
Figure 9.
• Down arrow button. Press to decrease the
temperature setpoint or scroll through settings options.
• Silence button. Press and release to activate quiet
mode operation. The indoor unit will change operation
to provide the quietest sound possible.
NOTE: Quiet mode operation may result in insufficient
cooling or heating capacity. Press and release the
Silence button again to stop quiet mode operation.
Frost Prevention Mode
• FP button. Press and hold for two seconds to
activate frost prevention mode. In heating mode
only, the indoor unit will operate at a 46°F set point
and the indoor unit display will show "FP". To cancel,
push the "ON/OFF", "SLEEP", "FP", "MODE", "FAN
SPEED" or "UP/DOWN" buttons.
9
Self Clean Function